var xmlhttp = CreateHTTPObject();
function CreateHTTPObject() {
	var xmlhttp;

	try {
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e) {
		try {
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (e) {
			xmlhttp = false;
		}
	}

	if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
		try {
			xmlhttp = new XMLHttpRequest();
		} catch (e) {
			xmlhttp = false;
		}
	}

	if (!xmlhttp && window.createRequest) {
		try {
			xmlhttp = window.createRequest();
		} catch (e) {
			xmlhttp = false;
		}
	}

	return xmlhttp;
}

// 使用全局变量 xmlhttp
function OnReadyStateChng() {
	if (xmlhttp.readyState == 0) {
		document.getElementById("board").innerHTML = "尚未初始化";
	} else if (xmlhttp.readyState == 1) {
		document.getElementById("board").innerHTML = "正在加载";
	} else if (xmlhttp.readyState == 2) {
		document.getElementById("board").innerHTML = "加载完毕";
	} else if (xmlhttp.readyState == 3) {
		document.getElementById("board").innerHTML = "正在处理";
	} else if (xmlhttp.readyState == 4) {
		document.getElementById("board").innerHTML = xmlhttp.responseText; // 处理完毕
	}
}
function logout_ajax(){
	var ParamString ='action=logout&vid='+Math.random();
	xmlhttp.open("get",'include/ajax_content.php?'+ParamString, true);
	xmlhttp.onreadystatechange =logout_action;
	xmlhttp.send(null);
}
function logout_action(){
	if (xmlhttp.readyState == 4) {
		//if (xmlhttp.responseText=="y")
			$("dft_nav_right_text").innerHTML = "我Yao成为爻网会员|<a href=\"output.php?action=login&error_id=login_0009\">登录</a>";
	}
	
}